Sometimes, certificate of origin is goods export documents , the customer usually have related requirements to the documents, Different certificates of origin can enjoy different import tax rates to customers, such as one importer is from Vietnam, he can purchase goods from different countries , why did he choose China? One reason is China-ASEAN free trade agreement, and the certificate of origin is that he can enjoy the documents of preferential policies.For example FORM E:

The floating ball valve is simple in structure, small in size and has good sealing, but the ball of the floating ball valve is floating, Under the medium pressure, the ball can produce certain displacement and press on the seat at the outlet end to ensure the seal of outlet port

China and Pakistan signed the China-Pakistan Free Trade Agreement, China exports to Pakistan as long as the products accord with the "China-Pakistan Free Trade Agreement rules of origin", exporters can apply for the CERTIFICATE OF ORIGIN CHINA- PAKISTAN FTA (that is, certificate of origin China-Pakistan FTA (FORM P)

Butterfly valves are not only widely used in petroleum, gas, chemical and water treatment, but also in the circulating water system of power plants.Wafer and flange are two types of connecting.Flange butterfly valve body has flange on both ends, connected to pipe flange.